Final answer:
The correct option is (e) correct as is. The sentence is already written correctly without any errors or unnecessary punctuation.
Step-by-step explanation:
The correct option is (e) correct as is. The sentence is already written correctly without any errors or unnecessary punctuation. The phrase volunteers who would like to work the morning shift is functioning as a noun clause modifying the subject volunteers. It is not necessary to set off the phrase with commas as it is an essential part of the sentence.